OnGetPreferredSizePtr: Pointer;
OnGetMinimumSizePtr: Pointer;
OnGetMaximumSizePtr: Pointer;
OnGetHeightForWidthPtr: Pointer;
OnParentViewChangedPtr: Pointer;
OnChildViewChangedPtr: Pointer;
OnWindowChangedPtr: Pointer;
OnLayoutChangedPtr: Pointer;
OnFocusPtr: Pointer;
OnBlurPtr: Pointer;
OnThemeChangedPtr: Pointer;
